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Income Taxes - Tax Effects of Temporary Differences (Detail) (USD $) In Thousands, unless otherwise specified | Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2010
--- | --- | --- | ---
Deferred tax assets: |  |  |
Intangible assets | $ 51,494 | $ 65,380 |
Net operating losses | 49,001 | 63,886 |
Capital loss carryforward | 1,122 | 1,760 |
Other | 8,707 | 9,139 |
Gross deferred tax assets | 110,324 | 140,165 |
Valuation allowance | (1,611) | (3,336) |
Gross deferred tax assets after valuation allowance | 108,713 | 136,829 | 93,000
Deferred tax liabilities: |  |  |
Intangible assets | (10,884) | (12,131) |
Other investments | (906) | (1,006) |
Gross deferred tax liabilities | (11,790) | (13,137) |
Deferred tax assets (liability), net | $ 96,923 | $ 123,692 |

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